The word mountainous is an adjective. Mountainous means (1) containing many mountains, (2) like a mountain in size and impressiveness, (3) having hills and crags.
The following articles and web pages elaborate on the word mountainous.
Visit this aircraft supplier directory for info about aircraft manufacturers and wholesalers in the United States of America. The photo on this page shows a commercial aircraft at an airport, with mountainous background.
Haiti shares the island of Hispaniola with the Dominican Republic, and the country is mountainous with the highest peak, Pic La Selle, at 8,770 feet. Haiti is among the poorest countries in the West.
Saba is a Dutch island south of St. Maarten in the Lesser Antilles. This tiny mountainous island boasts a highest point of 2,877 feet above sea level atop the Mount Scenery volcano.
St Lucia is a cultural and tropical delight. The island has a dynamic ethnic culture, and its lush and mountainous interior is well suited to treks and eco-adventures.
The following digital image illustrates the word mountainous.